@misc{indiciae4a20222df011,
  title = {Broad-band gain in optically pumped S2},
  author = {Epler, J. E. and Verdeyen, J. T.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840034803},
  note = {Source identifier: 19840034803}
}